Welding a pin

I have never really used weldments in SW before and after a bit of searching on here and trial and error, I cannot seem to get my parts to weld together. I want the cap to be welded to the pin and washer and the washer and pin to be welded together. The problem that I am running into, is that there is a gap between all of the parts. How can I make this work? I have attached a simplified assemblySolidworksWeldments